EP1803418A1 - D-shape stent for treatment of abdominal aortic aneurysm - Google Patents

D-shape stent for treatment of abdominal aortic aneurysm Download PDF

Info

Publication number
EP1803418A1
EP1803418A1 EP06256636A EP06256636A EP1803418A1 EP 1803418 A1 EP1803418 A1 EP 1803418A1 EP 06256636 A EP06256636 A EP 06256636A EP 06256636 A EP06256636 A EP 06256636A EP 1803418 A1 EP1803418 A1 EP 1803418A1
Authority
EP
European Patent Office
Prior art keywords
stent
diameter portion
prosthetic
semicircular portion
shape
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP06256636A
Other languages
German (de)
French (fr)
Other versions
EP1803418B1 (en
Inventor
Jin S. Park
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cordis Corp
Original Assignee
Cordis Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Cordis Corp filed Critical Cordis Corp
Publication of EP1803418A1 publication Critical patent/EP1803418A1/en
Application granted granted Critical
Publication of EP1803418B1 publication Critical patent/EP1803418B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/04—Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts
    • A61F2/06—Blood vessels
    • A61F2/07—Stent-grafts
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/86—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
    • A61F2/90—Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure characterised by a net-like or mesh-like structure
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/04—Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts
    • A61F2/06—Blood vessels
    • A61F2002/065—Y-shaped blood vessels
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/02—Prostheses implantable into the body
    • A61F2/04—Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts
    • A61F2/06—Blood vessels
    • A61F2002/065—Y-shaped blood vessels
    • A61F2002/067—Y-shaped blood vessels modular
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2/00—Filters implantable into blood vessels; Prostheses, i.e. artificial substitutes or replacements for parts of the body; Appliances for connecting them with the body; Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2/82—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents
    • A61F2002/826—Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents more than one stent being applied sequentially
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61F—FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS
    • A61F2230/00—Geometry of prostheses classified in groups A61F2/00 - A61F2/26 or A61F2/82 or A61F9/00 or A61F11/00 or subgroups thereof
    • A61F2230/0002—Two-dimensional shapes, e.g. cross-sections
    • A61F2230/0028—Shapes in the form of latin or greek characters
    • A61F2230/0034—D-shaped

Definitions

  • the invention relates to the field of medical devices, and more specifically to a prosthesis for the treatment of vascular disease, particularly abdominal aortic aneurysm.
  • Vascular disease is a leading cause of premature mortality in developed countries, often presenting as a vascular aneurysm.
  • a vascular aneurysm is a localized dilation of a vessel wall, due to thinning or weakness of the wall structure, or separation between layers of the vessel wall. If untreated, the aneurysm may burst and hemorrhage uncontrollably.
  • Aneurysms are particularly dangerous and prevalent in the aorta, because the aorta supplies blood to all other areas of the body, and because the aorta is subject to particularly high pressures and stresses accordingly.
  • Rupture of an aortic aneurysm is the 15 th leading cause of death the United States, afflicting 5% of older men.
  • Aortic aneurysms are described by their position. They are either thoracic, generally between the aortic arch and the junction of the left and right renal arteries, or abdominal, between the junction of the renal arteries and the branch of the iliac arteries.
  • the method includes providing a stent having a semicircular portion and a diameter portion connecting the ends of the semicircular portion.
  • the stent may be cut, for example, laser cut, from a unitary cylinder of material, preferably a shape memory material and more preferably Nitinol or a Nitinol alloy, and may be shape-set in the shape of a semicircular portion and a diameter portion connecting the ends of the semicircular portion.
  • a compressive force is applied to the diameter portion, which is then heated, preferably to between about 375 and about 650 degrees C, and more preferably between about 400 degrees C and about 600 degrees C, while under the compressive force.
  • Heat may be applied by one or more of resistance heating, air heating, laser heating, induction heating, and hot die application.
  • the ends of the semicircular portion hold the diameter portion in tension.
  • a prosthetic stent having a semicircular portion, and a diameter portion connecting the ends of the semicircular portion, the diameter portion being held in tension by the ends of the semicircular portion.
  • the prosthetic stent may include a vascular graft surrounding the stent.
  • the prosthetic stent preferably comprises a shape memory material, more preferably Nitinol or a Nitinol alloy.
  • the prosthetic stent may be comprised of a plurality of struts arranged in a repeating diamond pattern.
  • a bifurcated prosthetic stent graft for a bifurcated lumen, the bifurcated prosthetic stent graft having two stent grafts with co-located respective first ends, and disparately located respective second ends.
  • Each of the two stent grafts includes a first stent segment at the first end of the stent graft having a semicircular portion and a diameter portion connecting the ends of the semicircular portion, the diameter portion being held in tension by the ends of the semicircular portion such that the first stent segment defines a substantially D-shape.
  • One or more transition segments transitions the stent graft between a substantially D-shape on one end and a substantially circular shape on the opposite end.
  • the opposite end of the transition segment is in communication with the second end of the stent graft.
  • a vascular graft encloses the first stent segment and one or more transition stent segments, the vascular graft providing a fluid flow lumen from a first end of the stent graft to the second end of the stent graft.
  • a single D-shape stent generally 10, according to the present invention.
  • the stent 10 has a semicircular portion 12, and a diameter portion 14 connecting the ends of the semicircular portion 12.
  • the stent 10 is formed of plural struts 16.
  • the struts 16 are arranged in a diamond pattern, where four adjacent struts 16 define the borders of a diamond 18, with this pattern repeating in the stent 10.
  • other strut patterns are known in the art and may be substituted without departing from the present invention.
  • D-shape stent 10 preferably comprises a shape memory material, a group that includes, but is not limited to, Nitinol or a Nitinol alloy, examples of the latter including Nitinol Niobium (NiTi-Nb), Nitinol Platinum (NiTi-Pt), or Nitinol Tantalum (NiTi-Ta).
  • D-shape stent 10 can be formed by cutting the stent from a cylindrical tube of Nitinol or a Nitinol alloy, for example by a laser-cutting technique as is known in the art, and shape-setting the stent 10 into D-shape as shown.
  • the double D-stent assembly 50 is comprised of two individual D-stents 10, oriented with their respective diameter portions 14 adjacent and touching. One or more barbs at or near the respective diameter portions 14 of each D-Shape stent 10 and extending outward from the diameter portion 14 may be provided to interlock with the stent structure or associated graft of the other and resist migration.
  • the two D-stents 10 can be located in the abdominal aorta of a patient to form the structure of a circular inlet to a bifurcated AAA stent graft 100 (See Fig. 3). Accordingly, the two branches 106a, 106b, of the AAA stent graft 100 can be compressed to a low profile, and introduced to the aorta percutaneously, with all the associated advantages of minimally invasive surgical methods and techniques.
  • each D-shape stent 10 has points 20 at the bottom where additional stent segments can be attached or at least generally aligned.
  • the additional segments will either transition from the substantially D-shape of the stent 10 to a circular shape, or be circular shaped.
  • a bifurcated AAA stent graft generally 100, is illustrated.
  • Two D-stents 10 positioned as in assembly 50 form the first segment 102 of the stent graft 100.
  • transition segment 104 transitions between the substantially D-shape of stents 10 and the circular shape of branch 106a, 106b.
  • Each branch 106a, 106b includes a vascular graft 108a, 108b, carried by and surrounding D-shape stents 10, and additional transition or circular stent segments, to provide a fluid flow path through the respective branch 106a, 106b.
  • the semicircular portion 12 when inserted in the aorta, the semicircular portion 12 will be subjected to radially inward compressive stress by the vessel wall, represented by arrows 202. Absent measures such as those according to the present invention, this compression could induce a bowing or buckling of the diameter portion 14, as the compressive force reduces the distance between the ends of the semicircular portion 12, as illustrated in Figs. 4A, 4B.
  • the diameter portion 14 is placed under tension in the deployed shape. This is accomplished, for example, by applying a compression force to the diameter portion 14 during manufacture of the D-shape stent 10. While under compression, a localized heat treatment is applied only to only the diameter portion 14, while avoiding any heating of the semicircular portion 12.
  • Contemplated methods of heating include, but are not limited to, hot die application, resistance heating, induction heating, laser heating, or application of heated air to the diameter portion 14.
  • D-shape stent 10 is made of a Nitinol or a Nitinol alloy material
  • a preferred range of heating is between about 375-650 degrees C, and more preferably between about 400-600 degrees C. The heating alters the molecules of the diameter portion 14 to relive the compressive stress resulting from the applied compression force.
  • the heat application is preferably localized or isolated to only the diameter portion 14.
  • a heat sink can be used adjacent or near the semicircular portion 12 to direct heat away from or draw heat from the semicircular portion 12.
  • a D-shape stent 10 Following the heat treatment, having removed the influence of the compressive force, the ends of semicircular portion 12 of D-shape stent 10 hold the diameter portion 14 under tension.
  • arrows 204 illustrate the tension in diameter portion 14 of stent 10.
  • the tension in diameter portion 14 is relieved, but no buckling or bowing occurs. Accordingly, a D-shape stent 10 according to the present invention has greater dimensional stability in use.

Abstract

A bifurcated prosthetic stent graft (100) has two stent grafts with co-located respective first ends, and disparately located respective second ends. Each stent grafts includes a first stent segment (102) at the first end of the stent graft having a semicircular portion (12) and a diameter portion (14) connecting the ends of the semicircular portion (12) and held in tension by the ends of the semicircular portion (12), defining a substantially D-shape. Compression and heat applied to the diameter portion (14) during manufacture of the stent results in the diameter portion being in tension when the stent is deployed. One or more transition segments (104) transitions the stent graft between a substantially D-shape and a substantially circular shape. A vascular graft (108a,108b) encloses the first stent segment and one or more transition stent segments, the vascular graft providing a fluid flow lumen from the first end of the stent graft to the second end.
Figure imgaf001

Description

  • The invention relates to the field of medical devices, and more specifically to a prosthesis for the treatment of vascular disease, particularly abdominal aortic aneurysm.
  • Vascular disease is a leading cause of premature mortality in developed nations, often presenting as a vascular aneurysm. A vascular aneurysm is a localized dilation of a vessel wall, due to thinning or weakness of the wall structure, or separation between layers of the vessel wall. If untreated, the aneurysm may burst and hemorrhage uncontrollably. Aneurysms are particularly dangerous and prevalent in the aorta, because the aorta supplies blood to all other areas of the body, and because the aorta is subject to particularly high pressures and stresses accordingly. Rupture of an aortic aneurysm is the 15th leading cause of death the United States, afflicting 5% of older men.
  • Aortic aneurysms are described by their position. They are either thoracic, generally between the aortic arch and the junction of the left and right renal arteries, or abdominal, between the junction of the renal arteries and the branch of the iliac arteries.
  • It is known to treat aortic aneurysms surgically where blood pressure control medication is unsuccessful at arresting growth of the aneurysm. Surgery often involves the insertion of a vascular stent graft to exclude the aneurysm and carry blood past the dilated portion of the vessel, relieving the pressure on the aneurysm. Designing a viable stent graft for the treatment of abdominal aortic aneurysm (AAA) is particularly challenging, in part because the graft must branch to follow the shape of the abdominal aorta to carry blood into the separate iliac arteries without obstruction. Moreover, it would be advantageous to design a stent graft that is collapsible to facilitate percutaneous insertion by minimally invasive surgical techniques.
  • Provided according to the present invention is a method of forming a prosthetic stent, and a stent formed according to the method. The method includes providing a stent having a semicircular portion and a diameter portion connecting the ends of the semicircular portion. The stent may be cut, for example, laser cut, from a unitary cylinder of material, preferably a shape memory material and more preferably Nitinol or a Nitinol alloy, and may be shape-set in the shape of a semicircular portion and a diameter portion connecting the ends of the semicircular portion. A compressive force is applied to the diameter portion, which is then heated, preferably to between about 375 and about 650 degrees C, and more preferably between about 400 degrees C and about 600 degrees C, while under the compressive force. Heat may be applied by one or more of resistance heating, air heating, laser heating, induction heating, and hot die application. Upon releasing the compressive force, the ends of the semicircular portion hold the diameter portion in tension.
  • Also provided according to the present invention is a prosthetic stent having a semicircular portion, and a diameter portion connecting the ends of the semicircular portion, the diameter portion being held in tension by the ends of the semicircular portion. The prosthetic stent may include a vascular graft surrounding the stent. The prosthetic stent preferably comprises a shape memory material, more preferably Nitinol or a Nitinol alloy. The prosthetic stent may be comprised of a plurality of struts arranged in a repeating diamond pattern.
  • Also provided according to the present invention is a bifurcated prosthetic stent graft for a bifurcated lumen, the bifurcated prosthetic stent graft having two stent grafts with co-located respective first ends, and disparately located respective second ends. Each of the two stent grafts includes a first stent segment at the first end of the stent graft having a semicircular portion and a diameter portion connecting the ends of the semicircular portion, the diameter portion being held in tension by the ends of the semicircular portion such that the first stent segment defines a substantially D-shape. One or more transition segments transitions the stent graft between a substantially D-shape on one end and a substantially circular shape on the opposite end. The opposite end of the transition segment is in communication with the second end of the stent graft. A vascular graft encloses the first stent segment and one or more transition stent segments, the vascular graft providing a fluid flow lumen from a first end of the stent graft to the second end of the stent graft.
  • Embodiments of the invention will now be described by way of example with reference to the accompanying drawings, wherein like reference numerals refer to like structures across the several views, and in which:
    • Figs. 1A, 1B, 1C and 1D illustrate a single D-shape stent according to an embodiment of the present invention in perspective view, side elevation view, plan view, and front elevation view, respectively;
    • Figs. 2A, 2B, 2C and 2D illustrate a double D-shape stent assembly according to an embodiment of the present invention in perspective view, side elevation view, plan view, and front elevation view, respectively;
    • Fig. 3 illustrates a stent graft for the treatment of abdominal aortic aneurysm according to the present invention;
    • Figs. 4A and 4B illustrate the effect of radial compression on a D-shape stent according to less preferred embodiments of a D-shape stent; and
    • Fig. 5 illustrates the effect of radial compression on a D-shape stent according to a preferred embodiment of the present invention.
  • Referring now to Figs. 1A-1D, illustrated is a single D-shape stent, generally 10, according to the present invention. The stent 10 has a semicircular portion 12, and a diameter portion 14 connecting the ends of the semicircular portion 12. The stent 10 is formed of plural struts 16. The struts 16 are arranged in a diamond pattern, where four adjacent struts 16 define the borders of a diamond 18, with this pattern repeating in the stent 10. However, other strut patterns are known in the art and may be substituted without departing from the present invention.
  • D-shape stent 10 preferably comprises a shape memory material, a group that includes, but is not limited to, Nitinol or a Nitinol alloy, examples of the latter including Nitinol Niobium (NiTi-Nb), Nitinol Platinum (NiTi-Pt), or Nitinol Tantalum (NiTi-Ta). D-shape stent 10 can be formed by cutting the stent from a cylindrical tube of Nitinol or a Nitinol alloy, for example by a laser-cutting technique as is known in the art, and shape-setting the stent 10 into D-shape as shown.
  • Referring now to Figs. 2A-2D, illustrated is a double D-stent assembly, generally 50, according to the present invention. The double D-stent assembly 50 is comprised of two individual D-stents 10, oriented with their respective diameter portions 14 adjacent and touching. One or more barbs at or near the respective diameter portions 14 of each D-Shape stent 10 and extending outward from the diameter portion 14 may be provided to interlock with the stent structure or associated graft of the other and resist migration. The two D-stents 10 can be located in the abdominal aorta of a patient to form the structure of a circular inlet to a bifurcated AAA stent graft 100 (See Fig. 3). Accordingly, the two branches 106a, 106b, of the AAA stent graft 100 can be compressed to a low profile, and introduced to the aorta percutaneously, with all the associated advantages of minimally invasive surgical methods and techniques.
  • The diamonds 18 of each D-shape stent 10 have points 20 at the bottom where additional stent segments can be attached or at least generally aligned. The additional segments will either transition from the substantially D-shape of the stent 10 to a circular shape, or be circular shaped.
  • Referring now to Fig. 3, a bifurcated AAA stent graft, generally 100, is illustrated. Two D-stents 10 positioned as in assembly 50 form the first segment 102 of the stent graft 100. Thereafter, transition segment 104 transitions between the substantially D-shape of stents 10 and the circular shape of branch 106a, 106b. Each branch 106a, 106b, includes a vascular graft 108a, 108b, carried by and surrounding D-shape stents 10, and additional transition or circular stent segments, to provide a fluid flow path through the respective branch 106a, 106b.
  • Referring now to Figs. 4A and 4B, when inserted in the aorta, the semicircular portion 12 will be subjected to radially inward compressive stress by the vessel wall, represented by arrows 202. Absent measures such as those according to the present invention, this compression could induce a bowing or buckling of the diameter portion 14, as the compressive force reduces the distance between the ends of the semicircular portion 12, as illustrated in Figs. 4A, 4B.
  • According to the present invention, the diameter portion 14 is placed under tension in the deployed shape. This is accomplished, for example, by applying a compression force to the diameter portion 14 during manufacture of the D-shape stent 10. While under compression, a localized heat treatment is applied only to only the diameter portion 14, while avoiding any heating of the semicircular portion 12. Contemplated methods of heating include, but are not limited to, hot die application, resistance heating, induction heating, laser heating, or application of heated air to the diameter portion 14. Where D-shape stent 10 is made of a Nitinol or a Nitinol alloy material, a preferred range of heating is between about 375-650 degrees C, and more preferably between about 400-600 degrees C. The heating alters the molecules of the diameter portion 14 to relive the compressive stress resulting from the applied compression force.
  • Moreover, the heat application is preferably localized or isolated to only the diameter portion 14. Towards this end, a heat sink can be used adjacent or near the semicircular portion 12 to direct heat away from or draw heat from the semicircular portion 12.
  • Following the heat treatment, having removed the influence of the compressive force, the ends of semicircular portion 12 of D-shape stent 10 hold the diameter portion 14 under tension. Referring now to Fig. 5, arrows 204 illustrate the tension in diameter portion 14 of stent 10. When the semicircular portion 12 is subjected to radial compressive force, illustrated by arrows 202, the tension in diameter portion 14 is relieved, but no buckling or bowing occurs. Accordingly, a D-shape stent 10 according to the present invention has greater dimensional stability in use.

Claims (19)

  1. A prosthetic stent comprising:
    a semicircular portion;
    a diameter portion connecting the ends of the semicircular portion, the diameter portion being held in tension by the ends of the semicircular portion.
  2. The prosthetic stent according to claim 1, further comprising a vascular graft surrounding the stent.
  3. The prosthetic stent according to claim 1, further comprising one or more barbs at or near the diameter portion and extending outward from the diameter portion.
  4. A prosthetic stent formed by a process comprising:
    (a) providing a stent having a semicircular portion and a diameter portion connecting the ends of the semicircular portion;
    (b) applying a compressive force to the diameter portion;
    (c) applying heat to the diameter portion while under the compressive force; and
    (d) releasing the compressive force such that the ends of the semicircular portion hold the diameter portion in tension.
  5. The prosthetic stent according to claim 4, wherein the stent further comprises a vascular graft carried by the stent.
  6. The prosthetic stent according to claim 1 or 4, wherein the stent comprises a shape memory material.
  7. The prosthetic stent according to claim 6, wherein the shape-memory material comprises Nitinol or a Nitinol alloy.
  8. The prosthetic stent according to claim 1 or 4, further comprising a plurality of struts arranged in a repeating diamond pattern.
  9. A method of forming a prosthetic stent comprising:
    (a) providing a stent having a semicircular portion and a diameter portion connecting the ends of the semicircular portion;
    (b) applying a compressive force to the diameter portion;
    (c) applying heat to the diameter portion while under the compressive force; and
    (d) releasing the compressive force such that the ends of the semicircular portion hold the diameter portion in tension.
  10. The method according to claim 9, wherein the providing step further comprises shape-setting the stent in the shape of a semicircular portion and a diameter portion.
  11. The method according to claim 9, wherein the providing step further comprises cutting the stent from a unitary cylinder of material.
  12. The method according to claim 9, wherein the providing step further comprises providing the stent comprising a shape memory material.
  13. The method according to claim 12, wherein the providing step further comprises providing the stent comprising Nitinol or a Nitinol alloy.
  14. The method according to claim 9 or the prosthetic stent according to claim 4, wherein the step of applying heat further comprises applying heat to a temperature of between about 375 °C and about 650 °C.
  15. The method or prosthetic stent according to claim 14, wherein the step of applying heat further comprises applying heat to a temperature of between about 400 °C and about 600 °C.
  16. The method according to claim 9 or the prosthetic stent according to claim 4, wherein the step of applying heat further comprises applying heat by one or more of resistance heating, induction heating, laser heating, air heating, and hot die application.
  17. The method according to claim 9 or the prosthetic stent according to claim 4, wherein the step of applying heat further comprises isolating the application of heat to only the diameter portion and not to the semicircular portion.
  18. The method or prosthetic stent according to claim 17, wherein the step of applying heat further comprises providing a heat sink to direct heat away from or draw heat from the semicircular portion.
  19. A bifurcated prosthetic stent graft for a bifurcated lumen, the bifurcated prosthetic stent graft comprising two stent grafts having a co-located respective first ends, and disparately located respective second ends, each of the two stent grafts comprising:
    a first stent segment at the first end of the stent graft, the first stent segment having a semicircular portion and a diameter portion connecting the ends of the semicircular portion, the diameter portion being held in tension by the ends of the semicircular portion such that the first stent segment defines a substantially D-shape;
    one or more transition segments which transition between a substantially D-shape on one end and a substantially circular shape on the opposite end, the opposite end of the transition segment being in communication with the second end of the stent graft; and
    a vascular graft enclosing the first stent segment and one or more transition stent segments, the vascular graft providing a fluid flow lumen from a first end of the stent graft to the second end of the stent graft.
EP06256636A 2005-12-30 2006-12-29 D-shape stent for treatment of abdominal aortic aneurysm Active EP1803418B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11/323,013 US20070156229A1 (en) 2005-12-30 2005-12-30 "D"-shape stent for treatment of abdominal aortic aneurysm

Publications (2)

Publication Number Publication Date
EP1803418A1 true EP1803418A1 (en) 2007-07-04
EP1803418B1 EP1803418B1 (en) 2008-10-22

Family

ID=37890635

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06256636A Active EP1803418B1 (en) 2005-12-30 2006-12-29 D-shape stent for treatment of abdominal aortic aneurysm

Country Status (6)

Country Link
US (1) US20070156229A1 (en)
EP (1) EP1803418B1 (en)
JP (1) JP2007181693A (en)
AT (1) ATE411783T1 (en)
CA (1) CA2572288A1 (en)
DE (1) DE602006003302D1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011158045A1 (en) * 2010-06-18 2011-12-22 Lombard Medical Limited Stent-graft
EP2506799A1 (en) * 2009-12-01 2012-10-10 Altura Medical, Inc. Modular endograft devices and associated systems and methods
US9737426B2 (en) 2013-03-15 2017-08-22 Altura Medical, Inc. Endograft device delivery systems and associated methods
US10285833B2 (en) 2012-08-10 2019-05-14 Lombard Medical Limited Stent delivery systems and associated methods

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7544192B2 (en) 2003-03-14 2009-06-09 Sinexus, Inc. Sinus delivery of sustained release therapeutics
RU2007140909A (en) 2005-04-04 2009-05-20 Синексус, Инк. (Us) DEVICE AND METHODS FOR TREATING DISEASES OF THE NANOLAIN SINUS
WO2009079418A2 (en) * 2007-12-18 2009-06-25 Sinexus, Inc. Self-expanding devices and methods therefor
US20100305686A1 (en) * 2008-05-15 2010-12-02 Cragg Andrew H Low-profile modular abdominal aortic aneurysm graft
US20100063578A1 (en) * 2008-09-05 2010-03-11 Aga Medical Corporation Bifurcated medical device for treating a target site and associated method
US9427302B2 (en) 2009-04-09 2016-08-30 Medtronic Vascular, Inc. Stent having a C-shaped body section for use in a bifurcation
US8858613B2 (en) 2010-09-20 2014-10-14 Altura Medical, Inc. Stent graft delivery systems and associated methods
EP2552356B1 (en) * 2010-03-26 2019-03-13 Thubrikar Aortic Valve Inc. Valve component, frame component and prosthetic valve device including the same for implantation in a body lumen
ITTO20120372A1 (en) * 2012-04-27 2013-10-28 Marcio Scorsin MONOCUSPIDE CARDIAC VALVE PROSTHESIS
US10406332B2 (en) 2013-03-14 2019-09-10 Intersect Ent, Inc. Systems, devices, and method for treating a sinus condition
EP3003230B1 (en) * 2013-06-05 2018-07-25 Aortic Innovations Surena, LLC Variable depression stents (vds) and billowing graft assemblies
US10646324B2 (en) 2017-01-31 2020-05-12 Cook Medical Technologies, LLC Bifurcated stent graft with hemodynamic blood flow dividing wall
JP2022525788A (en) 2019-03-20 2022-05-19 インキュベート メディカル テクノロジーズ、 エルエルシー Aortic dissection implant

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6070589A (en) * 1997-08-01 2000-06-06 Teramed, Inc. Methods for deploying bypass graft stents
US6129756A (en) * 1998-03-16 2000-10-10 Teramed, Inc. Biluminal endovascular graft system
US6730119B1 (en) * 2000-10-06 2004-05-04 Board Of Regents Of The University Of Texas System Percutaneous implantation of partially covered stents in aneurysmally dilated arterial segments with subsequent embolization and obliteration of the aneurysm cavity
WO2004096092A1 (en) * 2003-05-02 2004-11-11 Jacques Seguin Vascular graft and deployment system

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5609627A (en) * 1994-02-09 1997-03-11 Boston Scientific Technology, Inc. Method for delivering a bifurcated endoluminal prosthesis
US6524336B1 (en) * 1998-04-09 2003-02-25 Cook Incorporated Endovascular graft

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6070589A (en) * 1997-08-01 2000-06-06 Teramed, Inc. Methods for deploying bypass graft stents
US6129756A (en) * 1998-03-16 2000-10-10 Teramed, Inc. Biluminal endovascular graft system
US6730119B1 (en) * 2000-10-06 2004-05-04 Board Of Regents Of The University Of Texas System Percutaneous implantation of partially covered stents in aneurysmally dilated arterial segments with subsequent embolization and obliteration of the aneurysm cavity
WO2004096092A1 (en) * 2003-05-02 2004-11-11 Jacques Seguin Vascular graft and deployment system

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2506799A1 (en) * 2009-12-01 2012-10-10 Altura Medical, Inc. Modular endograft devices and associated systems and methods
EP2506799A4 (en) * 2009-12-01 2014-10-29 Altura Medical Inc Modular endograft devices and associated systems and methods
EP2559402A3 (en) * 2009-12-01 2014-10-29 Altura Medical, Inc. Modular endograft devices and associated systems and methods
EP2559403A3 (en) * 2009-12-01 2014-10-29 Altura Medical, Inc. Modular endograft devices and associated systems and methods
EP2559401A3 (en) * 2009-12-01 2014-10-29 Altura Medical, Inc. Modular endograft devices and associated systems and methods
US9572652B2 (en) 2009-12-01 2017-02-21 Altura Medical, Inc. Modular endograft devices and associated systems and methods
WO2011158045A1 (en) * 2010-06-18 2011-12-22 Lombard Medical Limited Stent-graft
US10285833B2 (en) 2012-08-10 2019-05-14 Lombard Medical Limited Stent delivery systems and associated methods
US9737426B2 (en) 2013-03-15 2017-08-22 Altura Medical, Inc. Endograft device delivery systems and associated methods

Also Published As

Publication number Publication date
CA2572288A1 (en) 2007-06-30
US20070156229A1 (en) 2007-07-05
ATE411783T1 (en) 2008-11-15
DE602006003302D1 (en) 2008-12-04
EP1803418B1 (en) 2008-10-22
JP2007181693A (en) 2007-07-19

Similar Documents

Publication Publication Date Title
EP1803418B1 (en) D-shape stent for treatment of abdominal aortic aneurysm
CA2572720C (en) Prosthetic stent graft for treatment of abdominal aortic aneurysm
CN109069262A (en) Ilium branch unit and method
EP3113727B1 (en) Stent assembly for thoracoabdominal bifurcated aneurysm repair
US20200155297A1 (en) Self-curving stent-graft
US20100223776A1 (en) Endovascular prosthesis
CN102415909B (en) False chamber stopper
US11684497B2 (en) Intraluminal vessel prosthesis system
WO2017197313A1 (en) Systems and methods with graft body, inflatable fill channel, and filling structure
EP1825822B1 (en) A sealing gasket for a prosthetic vascular stent
EP3207902A1 (en) Spiral flow inducing stent and cannula cut method of making same
US8968386B2 (en) Stent and method for maintaining the area of a body lumen
US20150112418A1 (en) Segmented Balloon Expandable Stent Graft With Reduced Foreshortening

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

AX Request for extension of the european patent

Extension state: AL BA HR MK YU

17P Request for examination filed

Effective date: 20071204

17Q First examination report despatched

Effective date: 20080116

AKX Designation fees paid

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

Ref country code: CH

Ref legal event code: NV

Representative=s name: E. BLUM & CO. AG PATENT- UND MARKENANWAELTE VSP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 602006003302

Country of ref document: DE

Date of ref document: 20081204

Kind code of ref document: P

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20081022

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20081022

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090122

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090202

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20081022

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090222

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20081022

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20081022

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090323

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20081022

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20081022

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20081022

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20081022

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20081231

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20081022

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090122

26N No opposition filed

Effective date: 20090723

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20081022

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20081229

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090423

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20081022

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20081022

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20090123

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 10

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 11

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20151229

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20151229

PGRI Patent reinstated in contracting state [announced from national office to epo]

Ref country code: IT

Effective date: 20170710

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 12

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

Free format text: REGISTERED BETWEEN 20180614 AND 20180620

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: SERVOPATENT GMBH, CH

Ref country code: CH

Ref legal event code: PUE

Owner name: CARDINAL HEALTH SWITZERLAND 515 GMBH, CH

Free format text: FORMER OWNER: CORDIS CORPORATION, US

REG Reference to a national code

Ref country code: CH

Ref legal event code: PCAR

Free format text: NEW ADDRESS: WANNERSTRASSE 9/1, 8045 ZUERICH (CH)

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 602006003302

Country of ref document: DE

Representative=s name: PROCK, THOMAS, DR., GB

REG Reference to a national code

Ref country code: NL

Ref legal event code: PD

Owner name: CARDINAL HEALTH SWITZERLAND 515 GMBH; CH

Free format text: DETAILS ASSIGNMENT: CHANGE OF OWNER(S), ASSIGNMENT; FORMER OWNER NAME: CORDIS CORPORATION

Effective date: 20200708

REG Reference to a national code

Ref country code: BE

Ref legal event code: PD

Owner name: CARDINAL HEALTH SWITZERLAND 515 GMBH; CH

Free format text: DETAILS ASSIGNMENT: CHANGE OF OWNER(S), AUTRE, CHANGEMENT D'ADRESSE.

Effective date: 20200416

Ref country code: BE

Ref legal event code: PD

Owner name: CARDINAL HEALTH SWITZERLAND 515 GMBH; CH

Free format text: DETAILS ASSIGNMENT: CHANGE OF OWNER(S), AUTRE, CHANGEMENT D'ADRESSE.; FORMER OWNER NAME: CORDIS CORPORATION

Effective date: 20200416

REG Reference to a national code

Ref country code: GB

Ref legal event code: 732E

Free format text: REGISTERED BETWEEN 20201126 AND 20201202

REG Reference to a national code

Ref country code: DE

Ref legal event code: R082

Ref document number: 602006003302

Country of ref document: DE

Representative=s name: PROCK, THOMAS, DR., GB

Ref country code: DE

Ref legal event code: R081

Ref document number: 602006003302

Country of ref document: DE

Owner name: CARDINAL HEALTH SWITZERLAND 515 GMBH, CH

Free format text: FORMER OWNER: CORDIS CORP., MIAMI LAKES, FLA., US

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 20221226

Year of fee payment: 17

Ref country code: IE

Payment date: 20221227

Year of fee payment: 17

Ref country code: GB

Payment date: 20221227

Year of fee payment: 17

Ref country code: FR

Payment date: 20221227

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20221227

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20230109

Year of fee payment: 17

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20221221

Year of fee payment: 17

Ref country code: DE

Payment date: 20221228

Year of fee payment: 17